Home / 2,428.31-3,351.11-1,380.38

Finding the Fourth Proportional to 2,428.31, 3,351.11 and 1,380.38

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Solution

The fourth proportional to 2,428.31, 3,351.11 and 1,380.38 is: 1,904.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.31 : 3,351.11 = 1,380.38 : x
  2. Step 2: Convert to fraction form
    2,428.31/3,351.11 = 1,380.38/x
  3. Step 3: Cross multiply
    2,428.31x = 3,351.11 × 1,380.38
  4. Step 4: Simplify right side
    2,428.31x = 4,625,781.56
  5. Step 5: Solve for x
    x = 4,625,781.56/2,428.31
  6. Step 6: Final answer
    x = 1,904.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.